Loosen the valgrind version check slightly in run-tests.php so that it works

with the packaged valgrind in Ubuntu 10.04.

run-tests.php

@@ -572,7 +572,7 @@ if (isset($argc) && $argc > 1) {
 					if (!$valgrind_header) {
 						error("Valgrind returned no version info, cannot proceed.\nPlease check if Valgrind is installed.");
 					} else {
-						$valgrind_version = preg_replace("/valgrind-([0-9])\.([0-9])\.([0-9]+)([.-]\w+)?(\s+)/", '$1$2$3', $valgrind_header, 1, $replace_count);
+						$valgrind_version = preg_replace("/valgrind-([0-9])\.([0-9])\.([0-9]+)([.-\w]+)?(\s+)/", '$1$2$3', $valgrind_header, 1, $replace_count);
 						if ($replace_count != 1 || !is_numeric($valgrind_version)) {
 							error("Valgrind returned invalid version info (\"$valgrind_header\"), cannot proceed.");
 						}